Rabbling device



T. J. JAMISON RABBLING DEVICE Jan. 9, 1934.

Filed June 24, 1931 Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE 2Claims.

My invention relates to rabbling devices, one of my objects being toprovide a new and useful device of this character. Other objects maylater become apparent.

In the drawing:

Figure 1 is a sectional elevation through open hearth furnace showingthe rabbling device of this invention in position.

Figure 2 is a fragmentary sectional plan on the line 11-11 of Figure 1.

Figure 3 is an enlarged end elevation of the rabbling device.

Having reference to this drawing, an open hearth furnace 2, from whichthe molten metal has been drawn, has its floor or bottom 3 darnaged byholes 4 in which some of the molten metal has been retained. Before thebottom 3 can be renewed or repaired this retained metal must be rabbledout of the holes, this being quite customarily done manually with agreat expenditure of man power and time.

My invention provides a means for rabbling out the holes in furnaces bymechanical energy. It consists of a shaft 5 to which an elongated plate6 is pivoted by a bolt 7. This plate is positioned flatly against theshaft 5 and is arranged to normally hang vertically. It may, however,swing in line with the shaft 5 during its insertion and removal into andfrom a furnace through one of its charging doors.

In use the shaft 5 is thrust through a furnace door, the plate 6swinging back along this shaft to permit insertion of the unit, and ispositioned so that this plate hangs down over and into a puddle ofmolten metal contained in a hole in the furnace bottom. Power is thenapplied to the shaft to impart a rotative motion thereto, which may bean oscillatory one or a continuous rotation depending on the conditionand character of the hole being rabbled, the plate 6 effectivelyrabbling the hole clean.

A convenient method of applying power to the shaft 5 is to provide itsend with a coupling 8 which connects to a peel 9 of a furnace chargingmachine 10. This enables a cheap installation of my invention becausecharging machines are a necessary accessory to open hearth furnaces andare already in place. The charging machine here contemplated is theordinary type which has a bucket or shovel arrangement on a peel whichis inserted through a furnace door and rotated to discharge the loadinto the furnace.

Although I have shown and described a speciic form of my invention inaccordance with the patent statute, I do not intend to limit myinvention thereto except as defined by the appended claims.

I claim:

1. The combination with an open hearth furnace charging machine having apeel and means for imparting rotative movement to said peel, oi arabbling device comprising a shaft, means for coupling said shaft tosaid peel, an elongated plate iiatly positioned against and pivotallysecured to said shaft adjacent its outer end and adapted to swing freelyin line with said shaft and to be held against transverse movementrelative thereto whereby said plate will normally hang vertically fromsaid shaft and will move with said shaft when rotative movement isapplied thereto and will swing in line with said shaft during insertionof the apparatus through a furnace door.

2. |The combination with an open hearth furnace charging machine havinga peel and means for imparting rotative movement to said peel, of arabbling device comprising a shaft, means for coupling said shaft tosaid peel, an elongated member pivotally connected to said shaftadjacent the outer end thereof and adapted to swing freely in line withsaid shaft and to be held against transverse movement relative thereto,whereby said elongated member will normally hang vertically from saidshaft and will move with said shaft when rotative movement is appliedthereto, and will swing in line with said shaft during insertion of theapparatus through a furnace door.

